help changing fog light bulb

siopaolover

Registered

raymond-

W210 Moderator

i hope you have used the SEARCH feature as well as viewed the STICKY.

the bulb is held in with your typical wire spring stirrups. I can swap bulbs by
touch through the trap door. since you’re not familiar with this, you may then
want to consider pulling the fog light assembly which is held by single bolt.
visualize the layout and you’ll never have problems swapping out the bulb again.

siopaolover

Registered

raymond, thanks a lot! You just saved me from breaking everything

and when I checked the stickies and searched, nothing like this came up

raymond-

W210 Moderator

couple more..

siopaolover

Registered

haha I guess I’m just a horrible searcher

With that diagram, I was able to change both in under 10 mins. thanks again!

Systematical

Registered

I actually did use the search, and this was the first one I clicked on. homerun, thanks to Raymond. appreciate it.

It would have been annoying to actually use the search, only to find a thread where everyone beat a noob down and flamed them about using search and no actual help lol.

Registered

My right side fog lamp on my 1998 E320 died last night. The left one is fine. I went to the auto parts store and swapped out the dead one for a new one, following the above directions. I also applied some dielectric grease per the clerk’s suggestion since he said my lamp blew because of water intrusion into the housing.

Now both the right and left lamps fail to light up. could I have shorted a fuse when I was installing the lamp? Could it be the dielectric grease causing a fault?

Any advice is appreciated!

Check Codes

Registered

My right side fog lamp on my 1998 E320 died last night. The left one is fine. I went to the auto parts store and swapped out the dead one for a new one, following the above directions. I also applied some dielectric grease per the clerk’s suggestion since he said my lamp blew because of water intrusion into the housing.

Now both the right and left lamps fail to light up. could I have shorted a fuse when I was installing the lamp? Could it be the dielectric grease causing a fault?

Any advice is appreciated!

Hi, Pod. Please click user cp and edit details to add your vehicle and location to your profile, it’s often useful information when you’re seeking assistance.

If you overapplied the grease, it certainly could have. It’s conductive, so it may have shorted the circuit. The little «ears» on the connector are the ground, and there isn’t much distance between them and the (+) of the bulb itself.

BTW, if YOU didn’t see evidence of water intrusion, I wouldn’t worry about it. Unless you’re regularly driving through deep water, it’s never going to get into that connection area, though the lens will fog up because it’s not airtight as the gasket dries out.

The most common issue related to the W210 foglights is the substandard wiring MB used, which helps things overheat and the connector then melts into the bulb. Once that starts to happen, the clips weaken and bulb life shortens, it’s a vicious cycle. The only solution then is to replace the clips; no amount of dielectric grease will help that. There are workarounds and replacement harness repair kits available.

But for the immediate issue, I’d disconnect both bulbs and then turn on the circuit and check for voltage at the connectors. I’m guessing you’ll get none, then you have to see what blew.

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